CN114682988B - Repairing method of high-hardness high-corrosion-resistance hydraulic support hinge shaft - Google Patents
Repairing method of high-hardness high-corrosion-resistance hydraulic support hinge shaft Download PDFInfo
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- CN114682988B CN114682988B CN202210177174.XA CN202210177174A CN114682988B CN 114682988 B CN114682988 B CN 114682988B CN 202210177174 A CN202210177174 A CN 202210177174A CN 114682988 B CN114682988 B CN 114682988B
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- cladding
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005253 cladding Methods 0.000 claims abstract description 45
- 238000005299 abrasion Methods 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 238000004080 punching Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 24
- 230000008439 repair process Effects 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 2
- 238000005488 sandblasting Methods 0.000 claims description 2
- 238000003801 milling Methods 0.000 abstract 1
- 238000003754 machining Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
- NGONBPOYDYSZDR-UHFFFAOYSA-N [Ar].[W] Chemical compound [Ar].[W] NGONBPOYDYSZDR-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention provides a method for repairing a high-hardness high-corrosion-resistance hydraulic support hinge shaft, which comprises the following steps: dividing the outer peripheral surface of the hinge shaft into a middle complete section and wearing sections at two ends, inserting a self-made center into a threaded hole at one end of the hinge shaft, clamping the outer peripheral surface of the self-made center and a central hole at the other end of the hinge shaft by a lathe chuck, cladding the wearing sections at the two ends, and reserving the middle complete section; the method comprises the steps of (1) feeding a flat punching machine, clamping a complete section in the middle of a hinge shaft, checking two end faces of the hinge shaft by a cutter, milling an outer circular clamping head on an outer circle of the hinge shaft at one end of a threaded hole, wherein the diameter of the outer circular clamping head is equal to the diameter of the outer circumferential surface of a finished product of the hinge shaft, and correcting the central hole; and the lathe chuck clamps the outer circle clamp, the lathe top points the central hole, and the cladding layer on the abrasion section is turned to the diameter of the finished product.
Description
Technical Field
The invention relates to the field of hydraulic support part machining, in particular to a method for repairing a high-hardness high-corrosion-resistance hydraulic support hinge shaft.
Background
The hydraulic support is a device which utilizes hydraulic pressure to generate supporting force, provides support for the fully mechanized coal mining face and can change the supporting position through moving the support. Because the environment is abominable under the ore deposit, the articulated shaft of hydraulic support is as important connecting piece, and its corrosion is generally more serious, especially the faying face that contacts with the support owner muscle, often can be worn out the slot, this can only discard the processing before, perhaps grinds articulated shaft continuous use of little specification with it.
With the development of the excircle material adding technology in recent years, a new thought, a new way and new equipment are provided for the treatment of the hinge shaft, and the repair of the hinge shaft can be realized through the material adding technology. The current repair method of the hinge shaft mainly comprises the following steps: firstly, turning the excircle of the hinge shaft into thin integrally; then, horizontally punching a central hole at one end and a threaded hole at the other end; then, the outer circle of the hinge shaft is fully clad, and a cladding layer needs to reserve a certain machining allowance; finally, the outer circle of the hinge shaft is turned to the original size. The reason for the design step is that as the flatness of the cladding layer is generally poor, a certain gap exists between a high point and a low point, in order to ensure the straightness of the hinge shaft, the hinge shaft needs to be turned thin, then the threaded hole and the central hole are corrected, the threaded hole and the central hole are positioned on the same axis, a relatively flat substrate is provided for the cladding layer, and the thickness of the cladding layer needs to be relatively large in order to fully ensure the machining allowance; however, in the mode, on one hand, the thickness of the cladding layer is increased greatly, so that the cladding amount is increased, the repairing cost is increased, and on the other hand, the complexity of processing steps is increased.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a method for repairing the hinge shaft of the high-hardness high-corrosion-resistance hydraulic bracket, which has the advantages of scientific design, simple steps, small cladding amount and low repairing cost.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a repairing method of a high-hardness high-corrosion-resistance hydraulic support hinge shaft comprises the following steps: dividing the outer peripheral surface of the hinge shaft into a middle complete section and wearing sections at two ends, inserting a self-made center into a threaded hole at one end of the hinge shaft, clamping the outer peripheral surface of the self-made center and a central hole at the other end of the hinge shaft by a lathe chuck, cladding the wearing sections at the two ends, and reserving the middle complete section; step (b), a flat-punching machine is arranged, a complete section in the middle of the hinge shaft is clamped, two end faces of the hinge shaft are detected by a cutter, an outer circular clamping head is milled on an outer circle of the hinge shaft at one end of the threaded hole, the diameter of the outer circular clamping head is equal to the diameter of the outer circumferential surface of a finished product of the hinge shaft, and the center hole is corrected; and (c) clamping the outer circle clamping head by a lathe chuck, enabling a lathe tip to prop up the central hole, and turning the cladding layer on the abrasion section to the diameter of a finished product.
Based on the above, the welding wire ER76-G with a diameter of 1.2mm and the tungsten needle with a diameter of 4mm are adopted for cladding by using tungsten argon arc welding in the step (a).
Based on the above, the welding parameters in step (a) are: when the diameter of the workpiece of the hinge shaft is 80mm-110mm, the linear speed is 3.7+/-0.1 mm/s, the initial welding current is not more than 310+/-5A, the final welding current is not more than 240+/-5A, the wire feeding speed is 3.2+/-0.1 m/min, and the pitch is 8mm; when the diameter of the workpiece of the hinge shaft is 120mm-160mm, the linear speed is 3.7+/-0.1 mm/s, the initial welding current is not more than 320+/-5A, the final welding current is not more than 250+/-5A, the wire feeding speed is 3.2+/-0.1 m/min, and the pitch is 8mm.
Based on the above, the argon protection with the purity of 99.99% is adopted in the step (a), and the gas flow is 10-15L/min.
Based on the above, let the target diameter of the hinge shaft be Φd, in step (a), the wear segments at both ends are clad with an outer circle diameter of Φ (d+2)In the step (b), the diameter of the excircle clamping head is phi D/>In step (c), the cladding layer on the worn section is also turned to ΦD/>
Based on the above, the method for repairing the hinge shaft of the high-hardness high-corrosion-resistance hydraulic bracket further comprises the step of judging whether the hinge shaft needs cladding, and the judging standard comprises the following two conditions: (1) The abrasion depth of the outer circle of the matching surface is not more than 0.5mm, and the outer circle of the matching surface has no obvious abrasion groove; the diameter of the outer circle pitting of the matching surface is not more than 2mm, the depth is not more than 1mm, and the number is less than 30 points/dm 2; (2) the full length of the straightness is not more than 1mm; and the two requirements are met, and the cladding repair is not needed, otherwise, the cladding repair is needed.
Based on the above, step (a) is further preceded by a step of cleaning the hinge shaft and blasting the outer circumferential surface of the hinge shaft.
Based on the above, step (c) is further followed by a step of surface-hardening the hinge shaft.
Based on the above, the parameters of the surface quenching step are that the main shaft rotating speed is 12-20r/min, the coil feeding speed is 100-110mm/min, the current is 140-160A, the voltage is 510V, the alternating frequency is 1100HZ, and the surface hardness is HRC35-45.
Based on the above, the surface quenching step is further followed by the steps of surface galvanization and product inspection.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, in particular, the invention omits the steps of fine hinge shaft, correction screw hole and central hole of the vehicle before cladding, reduces working procedures, and can reduce cladding amount of the removed part; the middle complete section is used as a machining reference on a flat-punching machine, the excircle clamping head and the center hole are machined, the alignment problem is effectively solved, the cladding layer can be thinner, and compared with the traditional mode of firstly turning thin, then correcting the threaded hole and the center hole, and finally cladding a thicker cladding layer to ensure the straightness, the operation is simpler, the cladding amount is greatly reduced, and the repairing efficiency is greatly improved; the method has the advantages of scientific design, simple steps, small cladding amount and low repair cost.
Drawings
Fig. 1 is a schematic view of the structure of a worn hinge shaft according to the present invention.
Fig. 2 is a schematic view of the operation of cladding the hinge shaft in the present invention.
Fig. 3 is a schematic view illustrating an operation of the present invention for leveling a hinge shaft.
Fig. 4 is a schematic view illustrating an operation of turning an outer circle of a hinge shaft in the present invention.
Fig. 5 is a schematic structural view of a self-made tip in the present invention.
In the figure: 1. a hinge shaft; 2. a support main rib; 3. a mating surface; 4. self-made center; 5. a threaded hole; 6. an outer circle chuck; 7. a cladding layer; 11. a complete section; 12. and a wear segment.
Detailed Description
The technical scheme of the invention is further described in detail through the following specific embodiments.
As shown in fig. 1-5, a repairing method of a high-hardness high-corrosion-resistance hydraulic support hinge shaft comprises the following steps:
(1) Judging whether the hinge shaft 1 needs cladding or not, wherein the judging criteria have the following two requirements:
① The abrasion depth of the outer circle of the matching surface 3 is not more than 0.5mm, and the outer circle of the matching surface 3 has no obvious abrasion groove; the outer circle pitting diameter of the matching surface 3 is not more than 2mm, the depth is not more than 1mm, and the number of the matching surfaces is less than 30 points/dm 2, wherein the matching surface 3 refers to the surface of the hinge shaft 1, which is contacted with the support main rib 2;
② The full length of the straightness is not more than 1mm;
the method meets the two requirements without cladding repair, is directly used, and otherwise, enters the next cladding repair.
(2) Cleaning: and cleaning the coal ash on the surface of the hinge shaft 1.
(3) Sand blasting: the surface of the hinge shaft 1 is exposed to metallic luster.
(4) Cladding: dividing the outer peripheral surface of the hinge shaft 1 into a middle complete section 11 and wearing sections 12 at two ends, inserting a self-made center 4 into a threaded hole 5 at one end of the hinge shaft 1, clamping the outer peripheral surface of the self-made center 4 by a lathe chuck, jacking a center hole at the other end of the hinge shaft 1 by the lathe center, setting the target diameter of the hinge shaft 1 to be phi D, and cladding the wearing sections 12 at two ends to be phi (D+2)Leaving the middle intact segment 11; the cladding is performed by argon tungsten-arc welding, wherein welding wires of ER76-G with the diameter of 1.2mm, tungsten needles with the diameter of 4mm and argon with the purity of 99.99% are adopted for protection, and the welding parameters are as follows:
When the diameter of the workpiece of the hinge shaft 1 is 80mm-110mm, the linear speed is 3.7+/-0.1 mm/s, the initial welding current is not more than 310+/-5A, the final welding current is not more than 240+/-5A, the wire feeding speed is 3.2+/-0.1 m/min, the screw pitch is 8mm, and the gas flow is 10-15L/min;
When the diameter of the workpiece of the hinge shaft 1 is 120mm-160mm, the linear speed is 3.7+/-0.1 mm/s, the initial welding current is not more than 320+/-5A, the final welding current is not more than 250+/-5A, the wire feeding speed is 3.2+/-0.1 m/min, the screw pitch is 8mm, and the gas flow is 10-15L/min.
(5) Flat beating: the upper flat punch is used for clamping the whole section 11 in the middle of the hinge shaft 1, the two end surfaces of the hinge shaft 1 are detected by a cutter, an outer circular clamping head 6 is milled on the outer circle of the hinge shaft 1 positioned at one end of the threaded hole 5, and the diameter of the outer circular clamping head 6 is phi DAnd correcting the central hole.
(6) Turning an outer circle: the lathe chuck clamps the excircle clamping head 6, the lathe tip is propped against the central hole, and the cladding layer 7 on the abrasion section 12 is turned into phi D
(7) Surface quenching: the surface quenching parameters of the hinge shaft 1 are that the rotating speed of a main shaft is 12-20r/min, the feeding speed of a coil is 100-110mm/min, the current is 140-160A, the voltage is 510V, the alternating frequency is 1100HZ, and the surface hardness is HRC35-45.
(8) Surface galvanization: and (3) galvanizing the surface of the hinge shaft 1.
(9) And (3) product inspection: the repaired hinge shaft 1 is subjected to a pressing frame test in a 25000KN hydraulic support, the hinge shaft 1 after pressing frame is subjected to disassembling and inspection, and the problems of no crack, no obvious defect and the like in the surface penetration dye check of the hinge shaft 1 are solved.
Compared with the traditional cladding repairing method, the cladding repairing method omits the steps of turning a thin hinge shaft, correcting a threaded hole and a central hole before cladding, and utilizes the middle complete section 11 as a machining reference on a flat-bed machine to machine the outer circle clamping head 6 and the central hole, thereby effectively solving the alignment problem, enabling the cladding layer 7 to be thinner, enabling the operation to be simpler, greatly reducing the cladding amount and greatly improving the repairing efficiency; taking a hinging shaft with the diameter phi of 125mm and the length of 1000mm as an example, the traditional cladding process needs 12.91KG of welding wires, the welding wire consumption is reduced by 62.3% for the new process by only 4.86KG, and the cladding efficiency is improved from the traditional 7.8dm 2/h to 12.9dm 2/h, and the efficiency is improved by 65.4%.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (9)
1. The repairing method of the high-hardness high-corrosion-resistance hydraulic support hinge shaft is characterized by comprising the following steps of:
dividing the outer peripheral surface of the hinge shaft into a middle complete section and wearing sections at two ends, inserting a self-made center into a threaded hole at one end of the hinge shaft, clamping the outer peripheral surface of the self-made center and a central hole at the other end of the hinge shaft by a lathe chuck, cladding the wearing sections at the two ends, and reserving the middle complete section;
The welding parameters are as follows:
when the diameter of the workpiece of the hinge shaft is 80mm-110mm, the linear speed is 3.7+/-0.1 mm/s, the initial welding current is not more than 310+/-5A, the final welding current is not more than 240+/-5A, the wire feeding speed is 3.2+/-0.1 m/min, and the pitch is 8mm;
When the diameter of the workpiece of the hinge shaft is 120mm-160mm, the linear speed is 3.7+/-0.1 mm/s, the initial welding current is not more than 320+/-5A, the final welding current is not more than 250+/-5A, the wire feeding speed is 3.2+/-0.1 m/min, and the pitch is 8mm;
Step (b), a flat-punching machine is arranged, a complete section in the middle of the hinge shaft is clamped, two end faces of the hinge shaft are detected by a cutter, an outer circular clamping head is milled on an outer circle of the hinge shaft at one end of the threaded hole, the diameter of the outer circular clamping head is equal to the diameter of the outer circumferential surface of a finished product of the hinge shaft, and the center hole is corrected;
and (c) clamping the outer circle clamping head by a lathe chuck, enabling a lathe tip to prop up the central hole, and turning the cladding layer on the abrasion section to the diameter of a finished product.
2. The method for repairing the hinge shaft of the high-hardness high-corrosion-resistance hydraulic bracket according to claim 1, which is characterized in that: in the step (a), welding is performed by argon tungsten-arc welding, wherein a welding wire of ER76-G with the diameter of 1.2mm and a tungsten needle with the diameter of 4mm are adopted.
3. The method for repairing the high-hardness high-corrosion-resistance hydraulic support hinge shaft according to claim 2, wherein argon with the purity of 99.99% is adopted in the step (a), and the gas flow is 10-15L/min.
4. A method for repairing a hinge shaft of a high-hardness high-corrosion-resistance hydraulic support according to any one of claims 1 to 3, wherein: setting the target diameter of the hinge shaft as phi D, wherein in the step (a), the diameter of the fused outer circle of the wear sections at the two ends isIn the step (b), the diameter of the excircle clamping head is/>In step (c), the cladding layer on the worn section is also turned/>
5. The method for repairing a high-hardness high-corrosion-resistant hydraulic support hinge shaft according to claim 4, further comprising the step of judging whether the hinge shaft needs cladding or not, wherein the judging criteria have the following two requirements:
(1) The abrasion depth of the outer circle of the matching surface is not more than 0.5mm, and the outer circle of the matching surface has no obvious abrasion groove; the diameter of the outer circle pitting of the matching surface is not more than 2mm, the depth is not more than 1mm, and the number is less than 30 points/dm 2;
(2) The full length of the straightness is not more than 1mm;
And the two requirements are met, and the cladding repair is not needed, otherwise, the cladding repair is needed.
6. The repair method of the high-hardness high-corrosion-resistance hydraulic support hinge shaft according to any one of claims 1, 2,3 and 5, wherein: the step (a) is also preceded by the steps of cleaning the hinge shaft and sandblasting the peripheral surface of the hinge shaft.
7. The method for repairing the hinge shaft of the high-hardness high-corrosion-resistance hydraulic bracket according to claim 6, which is characterized in that: step (c) is further followed by a step of quench-hardening the hinge shaft surface.
8. The method for repairing the hinge shaft of the high-hardness high-corrosion-resistance hydraulic bracket according to claim 7, wherein the method comprises the following steps of: the parameters of the surface quenching step are that the rotating speed of a main shaft is 12-20r/min, the feeding speed of a coil is 100-110mm/min, the current is 140-160A, the voltage is 510V, the alternating frequency is 1100HZ, and the surface hardness is HRC35-45.
9. The repair method of the high-hardness high-corrosion-resistance hydraulic support hinge shaft according to claim 7 or 8, wherein the repair method comprises the following steps: the surface quenching step is also followed by the steps of surface galvanization and product inspection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210177174.XA CN114682988B (en) | 2022-02-25 | 2022-02-25 | Repairing method of high-hardness high-corrosion-resistance hydraulic support hinge shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210177174.XA CN114682988B (en) | 2022-02-25 | 2022-02-25 | Repairing method of high-hardness high-corrosion-resistance hydraulic support hinge shaft |
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| CN114682988A CN114682988A (en) | 2022-07-01 |
| CN114682988B true CN114682988B (en) | 2024-05-24 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204768A (en) * | 2006-12-22 | 2008-06-25 | 沈阳大陆激光技术有限公司 | Repair process of centrifugal compressor runner blade |
| CN101249510A (en) * | 2008-03-27 | 2008-08-27 | 安徽工业大学 | Repaired roller and method for repairing roller |
| CN105297009A (en) * | 2015-11-26 | 2016-02-03 | 宋禹辰 | Laser-cladding repairing process for centering roller |
| CN110453218A (en) * | 2019-09-10 | 2019-11-15 | 西安煤矿机械有限公司 | A kind of restorative procedure of the coalcutter planet carrier based on laser melting coating welding |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070044306A1 (en) * | 2005-08-29 | 2007-03-01 | United Technologies Corporation | Superalloy repair methods |
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2022
- 2022-02-25 CN CN202210177174.XA patent/CN114682988B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204768A (en) * | 2006-12-22 | 2008-06-25 | 沈阳大陆激光技术有限公司 | Repair process of centrifugal compressor runner blade |
| CN101249510A (en) * | 2008-03-27 | 2008-08-27 | 安徽工业大学 | Repaired roller and method for repairing roller |
| CN105297009A (en) * | 2015-11-26 | 2016-02-03 | 宋禹辰 | Laser-cladding repairing process for centering roller |
| CN110453218A (en) * | 2019-09-10 | 2019-11-15 | 西安煤矿机械有限公司 | A kind of restorative procedure of the coalcutter planet carrier based on laser melting coating welding |
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